The hotel is not the building where it says "hotel-22", but just across the street (the house you also see on the picture). It is part of the hohenlohe hotel, where also the check-in is. This part should be communicated better, but the hotel is aware of that.
the old house has been renovetad beautifully into nice and spacious rooms. The service was really friendly and very fast. Would definitely recommend trying it out.